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新生儿有些神经细胞轴突外面尚无________，所以刺激传导容易“泛化”。

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Various innovations have been introduced as ways to break off our system which forces students through a series of identical classrooms in which teachers do most of the talking and students have little opportunity to respond. Among these innovations are team teaching and teacher aides, non-graded elementary and secondary schools, independent study, curricula focused on helping students discover things for themselves rather than on trying to tell them everything, and schools designed for maximum flexibility so that students can work alone, or in small groups, or take part in large group instruction via diverse media. The aim of all these innovations is to adapt instruction more precisely to the needs of each individual student. Many people who have a strong dislike to organizing instruction scientifically and to bringing new technology into the schools and colleges fail to realize that the present system is in many respects mechanical and rigid. The vast differences in the ways students learn are disregarded when they are taught the same thing, in the same way, at the same time. There is no escaping the evidence that many students themselves feel little enthusiasm and even outright hostility for the present way schools and collages are organized and instruction is handled. Many of them resent technology, but what they object to is usually technology used as a means for handling a large number of students. Or it is programming which merely reproduces conventional classroom responds and learns, reaching new plateaus from which to climb to higher levels of understanding. Technological media can store information until it is needed or wanted. They can distribute it over distances to reach the student where he happens to be. They can present the information to the student through various senses. They can give the student the opportunity to react to the material in many ways. In short, the student’s opportunities for learning can be increased and enhanced by using a wide range of instructional technology. All the available resources for instruction, including the teacher, can work together to create conditions for maximum effective learning. It can be inferred from the article that a good educational system must ______.

A. not depend on teachers
B. make use of varying methods of teaching
C. place a renewed emphasis on science
D. not organize their instruction

判断并改正：新生儿四肢屈肌的力量小于伸肌，所以四肢呈蜷曲状。

（五）思考下面两则消息所披露的情况，完成后面的练习。（每空2分，共10分）【消息一】招收一百采煤工报名竟达九百余一向被认为招工难的煤炭行业最近出了桩新鲜事：山西大同矿务局云冈矿计划招收100名井下工，报名人数竞达980人，还有不少科室人员打“请调报告”，要求下井当煤工。为什么云冈矿的井下工这样吃香？这是由于该矿对一线工人在政治、经济等方面大幅度实行倾斜政策的结果。这个矿制定了井下工超产加价的“上台阶”分配方法，超产越多，收入越高，有的工人月收入逾千元。矿里分房，一线工人有优先权，去年盖的所有新楼都分给了井下工。年终评劳模，一线工人占了70%。加上采煤机械化程度已达到100%、，安全也有了可靠保障，工人真正感到腰包鼓了，地位高了，当矿工光荣。 ………… 【消息二】天津的吃劳保大军现在天津市有多少吃劳保的职工，谁也说不清。反正在自由市场、私营企业、个体餐馆、租摊承包的商店、咖啡厅、舞厅，以致马路上的修车点、街道上的理发摊，到处都能见到他们，而且绝大多数是青壮年。某厂一个男青年，吃劳保已3年了，夏天卖西瓜，冬天卖干鲜果品，生意越做越好，据说每月至少能挣七八百元。有一位国营餐馆的三级厨师吃劳保，到个体餐馆掌勺，每月挣700元，营业好还可多加。不管什么原因使这些职工吃劳保，也不管他们仍在外面赚了多少钱，绝大多数人都不愿意辞职。他们说：“既然现行政策有这么个漏洞，何不充分利用呢？” ………… 下面是从消息二中提炼出的观点，较为恰当的是：（）。①要加强对吃劳保人员的管理。②要做好吃劳保人员的思想政治工作。③要调整和完善劳保制度。

简答题如何对腰椎骨折的患儿进行现场处理？